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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
Shutter unless you use Wayland.
Flameshot is awesome.
I use ksnip and I'm quite happy with it https://github.com/ksnip/ksnip
NOTE:
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Hence, a higher number means a more popular project.